The first few pages must clearly state "Thirteenth Edition: 2023" (or the specific year of release). If it says "Reprint 2021," you have the 12th edition.
Suppose you have already downloaded a file named "PD_Sharma_Ecology_13th_Ed.pdf." Before you invest weeks studying it, perform this verification checklist: ecology and environment pd sharma 13th edition pdf verified
Go to the chapter on "Air Pollution." Look for the table listing the National Ambient Air Quality Standards (NAAQS) . The 13th edition should reference the 2022 revisions (e.g., the inclusion of PM1 standards for certain industrial areas). Older editions use 2009 data. The first few pages must clearly state "Thirteenth
For verification, nothing beats the physical copy. The 13th edition has specific visual identifiers: Buy new or used from:
Buy new or used from: